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.\" Copyright 1989 AT&T
.\" Portions Copyright (c) 1992, X/Open Company Limited.  All Rights Reserved.
.\" Copyright (c) 1995, Sun Microsystems, Inc.  All Rights Reserved.
.\"
.TH UUX 1C "Mar 28, 1995"
.SH NAME
uux \- UNIX-to-UNIX system command execution
.SH SYNOPSIS
.LP
.nf
\fBuux\fR [\fB-\fR] [\fB-bcCjnprz\fR] [\fB-a\fR \fIname\fR] [\fB-g\fR \fIgrade\fR]
     [\fB-s\fR \fIfilename\fR] [\fB-x\fR \fIdebug_level\fR] \fIcommand-string\fR
.fi

.SH DESCRIPTION
.sp
.LP
The \fBuux\fR utility will gather zero or more files from various systems,
execute a command on a specified system and then send standard output to a file
on a specified system.
.sp
.LP
\fBNote:\fR  For security reasons, most installations limit the list of
commands executable on behalf of an incoming request from \fBuux\fR, permitting
only the receipt of mail (see \fBmail\fR(1)). (Remote execution permissions are
defined in \fB/etc/uucp/Permissions\fR.)
.sp
.LP
The \fIcommand-string\fR is made up of one or more arguments that look like a
shell command line, except that the command and file names may be prefixed by
\fIsystem-name\fR\fB!\fR. A null \fIsystem-name\fR is interpreted as the local
system.
.sp
.LP
File names may be one of the following:
.RS +4
.TP
.ie t \(bu
.el o
An absolute path name.
.RE
.RS +4
.TP
.ie t \(bu
.el o
A path name preceded by \fB~\fR\fIxxx\fR, where \fIxxx\fR is a login name on
the specified system and is replaced by that user's login directory.
.RE
.sp
.LP
Anything else is prefixed by the current directory.
.sp
.LP
As an example, the command:
.sp
.in +2
.nf
example% \fBuux "!diff sys1!/home/dan/filename1 \e
       sys2!/a4/dan/filename2 > !~/dan/filename.diff"\fR
.fi
.in -2
.sp

.sp
.LP
will get the \fBfilename1\fR and \fBfilename2\fR files from the \fBsys1\fR and
\fBsys2\fR machines, execute a \fBdiff\fR(1) command and put the results in
\fBfilename.diff\fR in the local \fIPUBDIR\fR\fB/dan/\fR directory.
\fIPUBDIR\fR is a public directory defined in the \fBuucp\fR source. By
default, this directory is \fB/var/spool/uucppublic\fR.
.sp
.LP
Any special shell characters (such as \fB< > ; |\fR) should be quoted either by
quoting the entire \fIcommand-string\fR, or quoting the special characters as
individual arguments. The redirection operators \fB>>\fR,  \fB<<\fR, \fB>|\fR,
and \fB>&\fR cannot be used.
.sp
.LP
\fBuux\fR will attempt to get all appropriate files to the specified system
where they will be processed. For files that are output files, the file name
must be escaped using parentheses. For example, the command:
.sp
.in +2
.nf
example% \fBuux "a!cut -f1 b!/usr/filename > c!/usr/filename"\fR
.fi
.in -2
.sp

.sp
.LP
gets \fB/usr/filename\fR from system \fBb\fR and sends it to system \fBa\fR,
performs a \fBcut\fR command on that file and sends the result of the \fBcut\fR
command to system \fBc\fR.
.sp
.LP
\fBuux\fR will notify you if the requested command on the remote system was
disallowed. This notification can be turned off by the \fB-n\fR option. The
response comes by remote mail from the remote machine.
.SH OPTIONS
.sp
.LP
The following options are supported:
.sp
.ne 2
.na
\fB\fB\(mi\fR\fR
.ad
.RS 18n
The standard input to \fBuux\fR is made the standard input to the
\fIcommand-string\fR.
.RE

.sp
.ne 2
.na
\fB\fB-a\fR \fIname\fR\fR
.ad
.RS 18n
Uses \fIname\fR as the user job identification replacing the initiator user-id.
(Notification will be returned to user-id \fIname\fR.)
.RE

.sp
.ne 2
.na
\fB\fB-b\fR\fR
.ad
.RS 18n
Returns whatever standard input was provided to the \fBuux\fR command if the
exit status is non-zero.
.RE

.sp
.ne 2
.na
\fB\fB-c\fR\fR
.ad
.RS 18n
Does not copy local file to the spool directory for transfer to the remote
machine (default).
.RE

.sp
.ne 2
.na
\fB\fB-C\fR\fR
.ad
.RS 18n
Forces the copy of local files to the spool directory for transfer.
.RE

.sp
.ne 2
.na
\fB\fB-g\fR \fIgrade\fR\fR
.ad
.RS 18n
\fIgrade\fR can be either a single letter, number, or a string of alphanumeric
characters defining a service grade. The \fBuuglist\fR(1C) command determines
whether it is appropriate to use the single letter, number, or a string of
alphanumeric characters as a service grade. The output from the \fIuuglist\fR
command will be a list of service grades that are available or a message that
says to use a single letter or number as a  grade of service.
.RE

.sp
.ne 2
.na
\fB\fB-j\fR\fR
.ad
.RS 18n
Outputs the jobid string on the standard output which is the job
identification. This job identification can be used by \fBuustat\fR(1C) to
obtain the status  or terminate a job.
.RE

.sp
.ne 2
.na
\fB\fB-n\fR\fR
.ad
.RS 18n
Does not notify the user if the command fails.
.RE

.sp
.ne 2
.na
\fB\fB-p\fR\fR
.ad
.RS 18n
Same as \fB\(mi\fR\&. The standard input to \fBuux\fR is made the standard
input to the \fIcommand-string\fR.
.RE

.sp
.ne 2
.na
\fB\fB-r\fR\fR
.ad
.RS 18n
Does not start the file transfer, but just queues the job.
.RE

.sp
.ne 2
.na
\fB\fB-s\fR \fIfilename\fR\fR
.ad
.RS 18n
Reports status of the transfer in \fIfilename\fR. This option is accepted for
compatibility, but it is ignored because it is insecure.
.RE

.sp
.ne 2
.na
\fB\fB-x\fR \fIdebug_level\fR\fR
.ad
.RS 18n
Produces debugging output on the standard output. \fIdebug_level\fR is a number
between 0 and 9. As \fIdebug_level\fR increases to 9, more detailed debugging
information is given.
.RE

.sp
.ne 2
.na
\fB\fB-z\fR\fR
.ad
.RS 18n
Sends success notification to the user.
.RE

.SH ENVIRONMENT VARIABLES
.sp
.LP
See \fBenviron\fR(7) for descriptions of the following environment variables
that affect the execution of \fBuux\fR: \fBLANG\fR, \fBLC_ALL\fR,
\fBLC_CTYPE\fR, \fBLC_MESSAGES\fR, and \fBNLSPATH\fR.
.SH EXIT STATUS
.sp
.LP
The following exit values are returned:
.sp
.ne 2
.na
\fB\fB0\fR\fR
.ad
.RS 6n
Successful completion.
.RE

.sp
.ne 2
.na
\fB\fB>0\fR\fR
.ad
.RS 6n
An error occurred.
.RE

.SH FILES
.sp
.ne 2
.na
\fB\fB/etc/uucp/*\fR\fR
.ad
.RS 25n
other data and programs
.RE

.sp
.ne 2
.na
\fB\fB/etc/uucp/Permissions\fR\fR
.ad
.RS 25n
remote execution permissions
.RE

.sp
.ne 2
.na
\fB\fB/usr/lib/uucp/*\fR\fR
.ad
.RS 25n
other programs
.RE

.sp
.ne 2
.na
\fB\fB/var/spool/uucp\fR\fR
.ad
.RS 25n
spool directories
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE 	ATTRIBUTE VALUE
_
Interface Stability	Standard
.TE

.SH SEE ALSO
.sp
.LP
.BR cut (1),
.BR mail (1),
.BR uucp (1C),
.BR uuglist (1C),
.BR uustat (1C),
.BR attributes (7),
.BR environ (7),
.BR standards (7)
.SH NOTES
.sp
.LP
The execution of commands on remote systems takes place in an execution
directory known to the \fBuucp\fR system.
.sp
.LP
All files required for the execution will be put into this directory unless
they already reside on that machine. Therefore, the simple file name (without
path or machine reference) must be unique within the \fBuux\fR request. The
following command will NOT work:
.sp
.in +2
.nf
example% \fBuux "a!diff b!/home/dan/xyz c!/home/dan/xyz > !xyz.diff"\fR
.fi
.in -2
.sp

.sp
.LP
But the command:
.sp
.in +2
.nf
example% \fBuux "a!diff a!/home/dan/xyz c!/home/dan/xyz > !xyz.diff"\fR
.fi
.in -2
.sp

.sp
.LP
\fIwill\fR work (if \fBdiff\fR is a permitted command.)
.sp
.LP
Protected files and files that are in protected directories that are owned by
the requester can be sent in commands using \fBuux\fR. However, if the
requester is root, and the directory is not searchable by "other", the request
will fail.
.sp
.LP
The following restrictions apply to the shell pipeline processed by \fBuux\fR:
.RS +4
.TP
.ie t \(bu
.el o
In gathering files from different systems, pathname expansion in not performed
by \fBuux\fR. Thus, a request such as
.sp
.in +2
.nf
    \fBuux "c89 remsys!~/*.c"\fR
.fi
.in -2
.sp

would attempt to copy the file named literally \fB*.c\fR to the local system.
.RE
.RS +4
.TP
.ie t \(bu
.el o
Only the first command of a shell pipeline may have a \fIsystem-name\fR\fB!\fR.
All other commands are executed on the system of the first command.
.RE
.RS +4
.TP
.ie t \(bu
.el o
The use of the shell metacharacter \fB*\fR will probably not do what you want
it to do.
.RE
.RS +4
.TP
.ie t \(bu
.el o
The shell tokens \fB<<\fR and \fB>>\fR are not implemented.
.RE
.RS +4
.TP
.ie t \(bu
.el o
The redirection operators \fB>>\fR, \fB<<\fR, \fB>|\fR, and \fB>&\fR cannot be
used.
.RE
.RS +4
.TP
.ie t \(bu
.el o
The reserved word \fB!\fR cannot be used at the head of the pipeline to modify
the exit status.
.RE
.RS +4
.TP
.ie t \(bu
.el o
Alias substitution is not performed.
.RE
